Render Blocking Js
– This feature does NOT fix Optimize CSS Delivery warning.
How it works
You can find lots of tutorial which are talking about adding attributes which is “defer” or “async” or loading js after page load. This is so easy way but it does not fix the problems.
The all script tags are moved to the footer.
HTML comments may be in your html as below.
In this case, first we separate them and move only the script tags to the bottom.
Exclude Js Sources
If you wanna exclude some js sources, first of all you need to be sure that the js source is not affected by any other js sources. Secondly, you need to add data-wpfc-render="false" attribute as below.